Punkteeingabe & Korrektur für Klausuren (1.4)

Neuer Dialog ExamGradingDialog, erreichbar über "Punkte eingeben" im Klausuren-Tab (Button + Kontextmenü bei ausgewählter Klausur): - Eingaberaster: Schüler-Zeilen × Aufgaben-Spalten, Summe und Note live über GradingService.CalculateGrade() berechnet. - Tab bewegt sich nativ zur nächsten Zelle; Enter/Pfeil-Hoch/Pfeil-Runter springen zur gleichen Spalte in der Nachbarzeile (auch über noch nicht realisierte, virtualisierte Zeilen hinweg via ScrollIntoView). Komma oder Punkt als Dezimaltrennzeichen werden beide akzeptiert. - Abwesend-Checkbox (Note zeigt dann "abwesend") und Kommentarfeld pro Schüler. - Punkte außerhalb 0..Maximalpunkte werden rot markiert und bewusst nicht gespeichert; der zuletzt gültige Stand bleibt erhalten. - Autosave nach jeder Zelle, kein Speichern-Button nötig. Dabei nebenbei behoben: die Schülerliste berücksichtigt jetzt Enrollment- Zeiträume (H1/H2/Custom) relativ zum Klausurdatum, analog zur bereits bestehenden Logik im Mitarbeit-Tab, statt pauschal alle im Schuljahr eingeschriebenen Schüler zu zeigen. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-12 00:52:30 +02:00
parent 3fc506adc1
commit 725de3813f
7 changed files with 411 additions and 7 deletions
@@ -0,0 +1,158 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using LehrerApp.Core.Interfaces;
+using LehrerApp.Core.Models;
+using LehrerApp.Core.Services;
+using System.Collections.ObjectModel;
+using System.Globalization;
+
+namespace LehrerApp.Desktop.ViewModels.Groups;
+
+// ── Punkteeingabe & Korrektur (1.4) ──────────────────────────────────────────
+
+public partial class ExamGradingDialogViewModel : ObservableObject
+{
+    private readonly IExamResultRepository _results;
+    private readonly GradingService _grading;
+    private readonly Exam _exam;
+    private readonly double _examMaxPoints;
+
+    public string ExamTitle => _exam.Title;
+    public string ExamDateLabel => _exam.Date.ToString("dd.MM.yyyy");
+    public List<ExamTask> Tasks { get; }
+
+    public ObservableCollection<ExamResultRow> Rows { get; } = [];
+
+    public ExamGradingDialogViewModel(IExamResultRepository results, IStudentRepository students,
+        IEnrollmentRepository enrollments, GradingService grading, Exam exam, Guid groupId, string schoolYear)
+    {
+        _results = results; _grading = grading; _exam = exam;
+        Tasks = exam.Tasks.OrderBy(t => t.Nr).ToList();
+        _examMaxPoints = Tasks.Sum(t => t.MaxPoints);
+
+        var enrolled = students.GetByGroup(groupId, schoolYear);
+        var enrollmentList = enrollments.GetByGroupAndYear(groupId, schoolYear);
+        var existing = results.GetByExam(exam.Id).ToDictionary(r => r.StudentId);
+
+        foreach (var s in enrolled.OrderBy(s => s.LastName).ThenBy(s => s.FirstName))
+        {
+            var enrollment = enrollmentList.FirstOrDefault(e => e.StudentId == s.Id);
+            if (enrollment is not null && !IsEnrolledAtDate(enrollment, exam.Date)) continue;
+
+            existing.TryGetValue(s.Id, out var result);
+            var row = new ExamResultRow(s.Id, s.FullName, Tasks, result, _exam.GradingKey, _examMaxPoints, _grading);
+            row.OnChanged = SaveRow;
+            Rows.Add(row);
+        }
+    }
+
+    private void SaveRow(ExamResultRow row) => _results.Save(row.ToModel(_exam.Id));
+
+    private static bool IsEnrolledAtDate(Enrollment e, DateOnly date) => e.Period switch
+    {
+        EnrollmentPeriod.H1Only => date.Month >= 8 || date.Month <= 1,
+        EnrollmentPeriod.H2Only => date.Month >= 2 && date.Month <= 7,
+        EnrollmentPeriod.Custom => (e.JoinedAt is null || date >= e.JoinedAt.Value)
+                                 && (e.LeftAt  is null || date <= e.LeftAt.Value),
+        _                       => true,
+    };
+}
+
+// ── Zeile im Punkteraster ──────────────────────────────────────────────────
+
+public partial class ExamResultRow : ObservableObject
+{
+    private readonly Guid _resultId;
+    private readonly List<GradingKeyEntry> _gradingKey;
+    private readonly double _examMaxPoints;
+    private readonly GradingService _grading;
+
+    public Guid StudentId { get; }
+    public string Name { get; }
+
+    public ObservableCollection<PointsCell> Cells { get; } = [];
+
+    [ObservableProperty] private bool _absent;
+    [ObservableProperty] private string _comment = "";
+    [ObservableProperty] private double _totalPoints;
+    [ObservableProperty] private string _gradeDisplay = "";
+
+    public string TotalPointsDisplay => TotalPoints.ToString("0.##", CultureInfo.InvariantCulture);
+
+    public Action<ExamResultRow>? OnChanged { get; set; }
+
+    public ExamResultRow(Guid studentId, string name, List<ExamTask> tasks, ExamResult? existing,
+        List<GradingKeyEntry> gradingKey, double examMaxPoints, GradingService grading)
+    {
+        StudentId = studentId; Name = name;
+        _gradingKey = gradingKey; _examMaxPoints = examMaxPoints; _grading = grading;
+        _resultId = existing?.Id ?? Guid.NewGuid();
+        _absent = existing?.Absent ?? false;
+        _comment = existing?.Comment ?? "";
+
+        for (var i = 0; i < tasks.Count; i++)
+        {
+            double? pts = existing is not null && i < existing.Points.Count ? existing.Points[i] : null;
+            var cell = new PointsCell(tasks[i].MaxPoints, pts);
+            cell.OnChanged = () => { RecomputeTotals(); OnChanged?.Invoke(this); };
+            Cells.Add(cell);
+        }
+        RecomputeTotals();
+    }
+
+    partial void OnAbsentChanged(bool value)
+    {
+        RecomputeTotals();
+        OnChanged?.Invoke(this);
+    }
+
+    partial void OnCommentChanged(string value) => OnChanged?.Invoke(this);
+
+    private void RecomputeTotals()
+    {
+        TotalPoints = Cells.Sum(c => c.IsInvalid ? 0 : (c.Value ?? 0));
+        OnPropertyChanged(nameof(TotalPointsDisplay));
+        GradeDisplay = Absent ? "abwesend" : _grading.CalculateGrade(TotalPoints, _examMaxPoints, _gradingKey);
+    }
+
+    public ExamResult ToModel(Guid examId) => new()
+    {
+        Id = _resultId,
+        ExamId = examId,
+        StudentId = StudentId,
+        Points = Cells.Select(c => c.Value ?? 0).ToList(),
+        TotalPoints = TotalPoints,
+        Grade = Absent ? null : GradeDisplay,
+        Absent = Absent,
+        Comment = string.IsNullOrWhiteSpace(Comment) ? null : Comment.Trim(),
+    };
+}
+
+// ── Eine Punktezelle ─────────────────────────────────────────────────────────
+
+public partial class PointsCell : ObservableObject
+{
+    public double MaxPoints { get; }
+    [ObservableProperty] private double? _value;
+    [ObservableProperty] private bool _isInvalid;
+
+    public Action? OnChanged { get; set; }
+
+    public PointsCell(double maxPoints, double? value)
+    {
+        MaxPoints = maxPoints;
+        _value = value;
+        _isInvalid = IsOutOfRange(value);
+    }
+
+    /// Setzt den Wert; bei Punkten außerhalb 0..Maximalpunkte wird nur rot markiert,
+    /// aber nicht gespeichert (1.4.5) — OnChanged (und damit Autosave) wird dann nicht ausgelöst.
+    public void TrySetValue(double? value)
+    {
+        Value = value;
+        IsInvalid = IsOutOfRange(value);
+        if (!IsInvalid) OnChanged?.Invoke();
+    }
+
+    private bool IsOutOfRange(double? value) =>
+        value.HasValue && (value.Value < 0 || value.Value > MaxPoints + 0.0001);
+}
@@ -176,6 +176,7 @@ public partial class GroupDetailViewModel : ObservableObject
    public Func<Exam, Task<bool>>? OnEditExam { get; set; }
    public Func<Exam, Task<bool>>? OnDuplicateExam { get; set; }
    public Func<ExamSummary, Task<bool>>? OnConfirmDeleteExam { get; set; }
+    public Func<Exam, Task>? OnGradeExam { get; set; }

    public GroupDetailViewModel(IGroupRepository groups, IStudentRepository students,
        IEnrollmentRepository enrollments, IExamRepository exams, IGradeRepository grades,
@@ -276,6 +277,15 @@ public partial class GroupDetailViewModel : ObservableObject
        }
    }

+    [RelayCommand(CanExecute = nameof(HasSelectedExam))]
+    private async Task GradeExam()
+    {
+        if (SelectedExam is null || OnGradeExam is null) return;
+        var exam = _exams.GetById(SelectedExam.Id);
+        if (exam is null) return;
+        await OnGradeExam(exam);
+    }
+
    [RelayCommand(CanExecute = nameof(HasSelectedExam))]
    private async Task DuplicateExam()
    {
@@ -330,6 +340,7 @@ public partial class GroupDetailViewModel : ObservableObject
    partial void OnSelectedExamChanged(ExamSummary? value)
    {
        EditExamCommand.NotifyCanExecuteChanged();
+        GradeExamCommand.NotifyCanExecuteChanged();
        DuplicateExamCommand.NotifyCanExecuteChanged();
        DeleteExamCommand.NotifyCanExecuteChanged();
        AdvanceExamStatusCommand.NotifyCanExecuteChanged();
@@ -0,0 +1,26 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+        x:Class="LehrerApp.Desktop.Views.Groups.ExamGradingDialog"
+        x:DataType="vm:ExamGradingDialogViewModel"
+        Title="{Binding ExamTitle}"
+        Width="1000" Height="700" MinWidth="700" MinHeight="420"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="Auto,*,Auto" Margin="20">
+    <StackPanel Grid.Row="0" Orientation="Horizontal" Spacing="10" Margin="0,0,0,10">
+      <TextBlock Text="{Binding ExamTitle}" FontSize="16" FontWeight="SemiBold" VerticalAlignment="Center"/>
+      <TextBlock Text="{Binding ExamDateLabel}" FontSize="13" Opacity="0.6" VerticalAlignment="Center"/>
+    </StackPanel>
+
+    <DataGrid Grid.Row="1" Name="ResultGrid"
+              ItemsSource="{Binding Rows}"
+              AutoGenerateColumns="False"
+              IsReadOnly="False"
+              GridLinesVisibility="All"
+              CanUserReorderColumns="False"
+              CanUserResizeColumns="True"/>
+
+    <Button Grid.Row="2" Content="Fertig" HorizontalAlignment="Right" Margin="0,12,0,0" Click="OnClose"/>
+  </Grid>
+</Window>
@@ -0,0 +1,185 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using Avalonia.Data;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using Avalonia.Layout;
+using Avalonia.Media;
+using Avalonia.Threading;
+using Avalonia.VisualTree;
+using LehrerApp.Desktop.ViewModels.Groups;
+using System.Collections;
+using System.Globalization;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class ExamGradingDialog : Window
+{
+    private static readonly IBrush InvalidBackground = new SolidColorBrush(Color.Parse("#FFCDD2"));
+
+    public ExamGradingDialog() => InitializeComponent();
+
+    protected override void OnOpened(EventArgs e)
+    {
+        base.OnOpened(e);
+        if (DataContext is ExamGradingDialogViewModel vm) BuildColumns(vm);
+    }
+
+    private void BuildColumns(ExamGradingDialogViewModel vm)
+    {
+        var grid = this.FindControl<DataGrid>("ResultGrid");
+        if (grid is null) return;
+
+        grid.Columns.Clear();
+
+        grid.Columns.Add(new DataGridTextColumn
+        {
+            Header  = "Schüler",
+            Binding = new Binding("Name"),
+            IsReadOnly = true,
+            Width   = new DataGridLength(170, DataGridLengthUnitType.Pixel),
+        });
+
+        for (var i = 0; i < vm.Tasks.Count; i++)
+        {
+            var task = vm.Tasks[i];
+            grid.Columns.Add(new DataGridTemplateColumn
+            {
+                Header       = string.IsNullOrWhiteSpace(task.Title) ? $"Aufg. {task.Nr}" : $"{task.Nr}. {task.Title}",
+                Width        = new DataGridLength(1, DataGridLengthUnitType.Star),
+                CellTemplate = BuildPointsCellTemplate(i, grid),
+            });
+        }
+
+        grid.Columns.Add(new DataGridTextColumn
+        {
+            Header = "Summe", Binding = new Binding("TotalPointsDisplay"), IsReadOnly = true,
+            Width = new DataGridLength(70, DataGridLengthUnitType.Pixel),
+        });
+        grid.Columns.Add(new DataGridTextColumn
+        {
+            Header = "Note", Binding = new Binding("GradeDisplay"), IsReadOnly = true,
+            Width = new DataGridLength(70, DataGridLengthUnitType.Pixel),
+        });
+        grid.Columns.Add(new DataGridTemplateColumn
+        {
+            Header = "Abw.", Width = new DataGridLength(50, DataGridLengthUnitType.Pixel),
+            CellTemplate = BuildAbsentCellTemplate(),
+        });
+        grid.Columns.Add(new DataGridTemplateColumn
+        {
+            Header = "Kommentar", Width = new DataGridLength(180, DataGridLengthUnitType.Pixel),
+            CellTemplate = BuildCommentCellTemplate(grid),
+        });
+    }
+
+    private IDataTemplate BuildPointsCellTemplate(int taskIndex, DataGrid grid)
+    {
+        var cellName = $"Pts_{taskIndex}";
+        return new FuncDataTemplate<ExamResultRow>((row, _) =>
+        {
+            if (row is null) return new TextBlock();
+            var cell = row.Cells.ElementAtOrDefault(taskIndex);
+            if (cell is null) return new TextBlock();
+
+            var tb = new TextBox
+            {
+                Name = cellName,
+                Text = FormatPoints(cell.Value),
+                BorderThickness = new Thickness(0),
+                Background = Brushes.Transparent,
+                Padding = new Thickness(6, 4),
+                HorizontalContentAlignment = HorizontalAlignment.Center,
+            };
+            ToolTip.SetTip(tb, $"max. {FormatPoints(cell.MaxPoints)} Punkte");
+            UpdateInvalidVisual(tb, cell.IsInvalid);
+
+            cell.PropertyChanged += (_, pe) =>
+            {
+                if (pe.PropertyName == nameof(PointsCell.IsInvalid))
+                    UpdateInvalidVisual(tb, cell.IsInvalid);
+            };
+
+            tb.LostFocus += (_, _) => CommitPointsCell(tb, cell);
+            tb.KeyDown += (_, e) => HandleCellKeyDown(e, grid, row, cellName);
+
+            return tb;
+        });
+    }
+
+    private static void CommitPointsCell(TextBox tb, PointsCell cell)
+    {
+        var text = tb.Text?.Trim().Replace(',', '.');
+        double? parsed = string.IsNullOrEmpty(text)
+            ? null
+            : double.TryParse(text, NumberStyles.Any, CultureInfo.InvariantCulture, out var v) ? v : cell.Value;
+        cell.TrySetValue(parsed);
+        tb.Text = FormatPoints(cell.Value);
+    }
+
+    private static void UpdateInvalidVisual(TextBox tb, bool invalid) =>
+        tb.Background = invalid ? InvalidBackground : Brushes.Transparent;
+
+    private static string FormatPoints(double? value) =>
+        value?.ToString("0.##", CultureInfo.InvariantCulture) ?? "";
+
+    private IDataTemplate BuildAbsentCellTemplate()
+    {
+        return new FuncDataTemplate<ExamResultRow>((row, _) =>
+        {
+            if (row is null) return new TextBlock();
+            var cb = new CheckBox { IsChecked = row.Absent, HorizontalAlignment = HorizontalAlignment.Center };
+            cb.IsCheckedChanged += (_, _) => row.Absent = cb.IsChecked == true;
+            return cb;
+        });
+    }
+
+    private IDataTemplate BuildCommentCellTemplate(DataGrid grid)
+    {
+        const string cellName = "Comment";
+        return new FuncDataTemplate<ExamResultRow>((row, _) =>
+        {
+            if (row is null) return new TextBlock();
+            var tb = new TextBox
+            {
+                Name = cellName,
+                Text = row.Comment,
+                BorderThickness = new Thickness(0),
+                Background = Brushes.Transparent,
+                Padding = new Thickness(6, 4),
+            };
+            tb.LostFocus += (_, _) => row.Comment = tb.Text ?? "";
+            tb.KeyDown += (_, e) => HandleCellKeyDown(e, grid, row, cellName);
+            return tb;
+        });
+    }
+
+    /// Enter/Pfeil-Hoch/Pfeil-Runter springen zur gleichen Spalte in der Nachbarzeile
+    /// (Tab funktioniert bereits über die normale Fokus-Reihenfolge).
+    private void HandleCellKeyDown(KeyEventArgs e, DataGrid grid, object rowItem, string cellName)
+    {
+        if (e.Key is not (Key.Down or Key.Up or Key.Enter)) return;
+        e.Handled = true;
+
+        if (grid.ItemsSource is not IList items) return;
+        var idx = items.IndexOf(rowItem);
+        if (idx < 0) return;
+        var targetIdx = e.Key == Key.Up ? idx - 1 : idx + 1;
+        if (targetIdx < 0 || targetIdx >= items.Count) return;
+
+        var targetItem = items[targetIdx]!;
+        grid.ScrollIntoView(targetItem, grid.CurrentColumn);
+
+        Dispatcher.UIThread.Post(() =>
+        {
+            var targetTb = grid.GetVisualDescendants().OfType<TextBox>()
+                .FirstOrDefault(t => t.DataContext == targetItem && t.Name == cellName);
+            if (targetTb is null) return;
+            targetTb.Focus();
+            targetTb.SelectAll();
+        }, DispatcherPriority.Loaded);
+    }
+
+    private void OnClose(object? sender, RoutedEventArgs e) => Close();
+}
@@ -70,6 +70,7 @@
        <Grid RowDefinitions="Auto,*">
          <StackPanel Grid.Row="0" Orientation="Horizontal" Spacing="8" Margin="0,0,0,8"
                      IsVisible="{Binding SelectedExam, Converter={x:Static ObjectConverters.IsNotNull}}">
+            <Button Content="Punkte eingeben" Command="{Binding GradeExamCommand}"/>
            <Button Content="Bearbeiten"    Command="{Binding EditExamCommand}"/>
            <Button Content="Duplizieren"   Command="{Binding DuplicateExamCommand}"/>
            <SplitButton Content="Status ▸" Command="{Binding AdvanceExamStatusCommand}">
@@ -111,6 +112,7 @@
            </DataGrid.Columns>
            <DataGrid.ContextMenu>
              <ContextMenu>
+                <MenuItem Header="Punkte eingeben" Command="{Binding GradeExamCommand}"/>
                <MenuItem Header="Bearbeiten"    Command="{Binding EditExamCommand}"/>
                <MenuItem Header="Duplizieren"   Command="{Binding DuplicateExamCommand}"/>
                <MenuItem Header="Status">
@@ -21,6 +21,7 @@ public partial class GroupDetailView : UserControl
            vm.OnEditExam        = ShowEditExamDialog;
            vm.OnDuplicateExam   = ShowDuplicateExamDialog;
            vm.OnConfirmDeleteExam = ShowDeleteExamDialog;
+            vm.OnGradeExam       = ShowGradeExamDialog;
        }
    }

@@ -75,4 +76,20 @@ public partial class GroupDetailView : UserControl
        var owner = TopLevel.GetTopLevel(this) as Window;
        return owner is not null && await dialog.ShowDialog<bool>(owner);
    }
+
+    private async Task ShowGradeExamDialog(Exam exam)
+    {
+        if (DataContext is not GroupDetailViewModel vm || vm.Group is null) return;
+
+        var dialogVm = new ExamGradingDialogViewModel(
+            App.Services.GetRequiredService<IExamResultRepository>(),
+            App.Services.GetRequiredService<IStudentRepository>(),
+            App.Services.GetRequiredService<IEnrollmentRepository>(),
+            App.Services.GetRequiredService<GradingService>(),
+            exam, vm.Group.Id, vm.Group.SchoolYear);
+
+        var dialog = new ExamGradingDialog { DataContext = dialogVm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is not null) await dialog.ShowDialog(owner);
+    }
 }